panjang × lebar
8 × 5
40 cm²
2p + 2l
2 ( 8 ) + 2 ( 5 )
16 + 10
26 cm
s² = t² + p²
s² = 9² + 8²
s² = 81 + 64
s² = 145
s = √145 cm
Luas Alas + ½ × keliling Alas × sisi miring
40 + ½ × 26 × √145
40 + 26/2 × √145
40 + 13 × √145
40 + 13√145 cm²
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panjang × lebar
8 × 5
40 cm²
2p + 2l
2 ( 8 ) + 2 ( 5 )
16 + 10
26 cm
s² = t² + p²
s² = 9² + 8²
s² = 81 + 64
s² = 145
s = √145 cm
Luas Alas + ½ × keliling Alas × sisi miring
40 + ½ × 26 × √145
40 + 26/2 × √145
40 + 13 × √145
40 + 13√145 cm²